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21 Cards in this Set
- Front
- Back
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Draw an electron shell diagram for Magnesium.
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The rule of calculating the max number of electrons in each shell.
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Electron Capacity = 2n2
The variable n represents the Principal Quantum Number, the number of the energy level in question. Refer to; http://education.jlab.org/qa/electron_number.html |
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Write an Ionic Bonding formula. (Cross over method)
Ca+2 + Cl-1 ---> ? + ? Cr+3 + O-2 ---> ? + ? |
CaCl2
Cr2O3 |
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What are Anions and Cations?
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Anions are negatively charged ions.
Cations are positively charged ions. |
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Properties of Ionic Compounds.
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- Hard
- Form crystal lattices not molecules - Good insulators - High melting points/ Boiling Points - Conduct electricity when dissolved in water or as a liquid. - Solids do not conduct electricity |
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Difference between simple ions and compound ions?
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Simple ions only have one element. Compound ions have two or more elements.
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Covalent bonding. Draw an electron dot diagram for Sodium.
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Properties of covalent bonds.
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Soft-tend to be gases, liquids or soft solids
Poor conductors of heat and electricity. Molecules. Brittle or cleave rather than deform. Non-electrolytes - Do not conduct electricity in water. |
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Name three compounds.
1) 2) 3) |
1) Water - H2O
2) 3) Salt - |
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Define reactants.
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Reactants are substances combined in order to make a product.
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Difference between chemical and physical changes?
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You can't undo chemical changes, whereas physical changes can be reversed.
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Three states of matter.
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Solid, Liquid and Gas.
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Law of Conservation of Mass.
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The matter can't be created or destroyed during a chemical reaction.
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Types of Chemical Reactions - Synthesis reactions.
Sodium + Chloride ---> |
When two substances are combined to form one product.
NaCl |
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Decomposition reactions.
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In a decomposition reaction a compound is broken into smaller chemical species.
AB ---> A + B |
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Single displacement reactions.
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A single-displacement reaction, also called single-replacement reaction, is a type of oxidation-reduction chemical reaction when an element or ion moves out of one compound and into another. (One element is replaced by another in a compound.)
A + BX → AX + B |
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Double displacement reactions.
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In double displacement reactions two ionic compounds switch cations.
The general pattern of a double displacement reaction is: AB + CD ® AD + CB |
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Corrosion reactions.
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In a corrosion reaction, a material reacts with chemicals in its surroundings and breaks down. For example, when iron reacts with water and air, it "rusts" or "corrodes" to make iron oxide, Fe2O3 (rust).
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Methods of transferring heat - Convection
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Convection is the spread of heat due to the movement of particles in liquids and gasses. Hot particles will rise as they are less dense. Cold particles will fall.
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Define Conduction.
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Conduction is when heat transfer occurs in solids. Heat is transferred with particles coming into contact with each other.
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Define Radiation.
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